CN101774565B - Method for deeply deashing cock - Google Patents
Method for deeply deashing cock Download PDFInfo
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- CN101774565B CN101774565B CN2009101632328A CN200910163232A CN101774565B CN 101774565 B CN101774565 B CN 101774565B CN 2009101632328 A CN2009101632328 A CN 2009101632328A CN 200910163232 A CN200910163232 A CN 200910163232A CN 101774565 B CN101774565 B CN 101774565B
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- cock
- alkali
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- coke powder
- solution
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- 238000000034 method Methods 0.000 title claims abstract description 34
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 56
- 239000003513 alkali Substances 0.000 claims abstract description 44
- 239000000047 product Substances 0.000 claims abstract description 34
- 239000007787 solid Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 239000002253 acid Substances 0.000 claims abstract description 19
- 238000002386 leaching Methods 0.000 claims abstract description 16
- 238000005554 pickling Methods 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 239000002699 waste material Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 44
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 26
- 239000000571 coke Substances 0.000 claims description 23
- 238000007654 immersion Methods 0.000 claims description 15
- 239000000543 intermediate Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 8
- 239000002585 base Substances 0.000 claims description 6
- 239000002817 coal dust Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000005054 agglomeration Methods 0.000 claims description 4
- 230000002776 aggregation Effects 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 230000003472 neutralizing effect Effects 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000002829 reductive effect Effects 0.000 abstract description 5
- 239000012141 concentrate Substances 0.000 abstract description 2
- 239000000843 powder Substances 0.000 abstract 5
- 239000013067 intermediate product Substances 0.000 abstract 2
- 239000002956 ash Substances 0.000 description 23
- 239000000203 mixture Substances 0.000 description 13
- 239000002994 raw material Substances 0.000 description 11
- 238000000605 extraction Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 239000005997 Calcium carbide Substances 0.000 description 6
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 6
- 239000003245 coal Substances 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000013467 fragmentation Methods 0.000 description 3
- 238000006062 fragmentation reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000002802 bituminous coal Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000010808 liquid waste Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011027 product recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for deeply deashing cock, which includes the following steps that: cock is crushed, so that the ash impurity in the cock can be fully exposed; the crushed cock powder and aqueous sodium hydroxide solution are added in a high-pressure kettle and heated to react, so that part of the ash can be removed; the liquid and the solid of leaching slurry are separated, so that intermediate products leached in one step, i.e. cock powder and alkali leaching solution, are obtained; the intermediate product, the cock powder, is washed by water and naturally aired, and the next step, normal-pressure acid pickling, is carried out. The liquid and the solid of leaching slurry are separated, so that products, i.e. cock powder and acid leaching solution, are obtained. The obtained low-ash cock powder can be directly used as product or agglomerated according to production requirements. After the alkali leaching solution and the acid leaching solution are recycled for multiple times, the solution concentrate is reduced, the impurity concentration is increased, the leaching effect becomes poor, and thereby the alkali leaching solution and the acid leaching solution can be stored as leaching waste solutions. The acid waste solution and the alkali waste solution can be neutralized by each other, so that the waste solution treatment cost is reduced.
Description
Technical field
The present invention relates to the treatment process of carbonaceous material, particularly relate to the treatment process of deeply deashing cock.
Background technology
China is first big producing country, the first consumption big country and first big export country of coke in the world today.The present coke output of China accounts for the over half of global output, and outlet accounts for nearly sixty percent of global trade amount.Coke is mainly used in the blast furnace smelting of non-ferrous metals such as blast furnace ironmaking and copper, lead, zinc, titanium, antimony, mercury, plays effects such as reductive agent, heat-generating agent and stock column skeleton.In addition, coke also is used for industries such as casting, chemical industry, calcium carbide and iron alloy.The specification of quality of different industries STRENGTH ON COKE has nothing in common with each other, but generally speaking, ash oontent is low more in the coke, and fixed carbon content is high more, and is favourable more to industrial production.Ash content in the coke not only influences the intensity of coke itself, and the energy consumption in the production process, batching consumption and product production, quality are all had very big influence.With the blast-furnace smelting is example, the every increase by 1% of ash oontent in the coke, and blast furnace coke ratio improves 2% approximately, and amount of lime increases by 2.5% approximately, and furnace processor descends 3% approximately.In calcium carbide was produced, the every increase by 1% of ash oontent in the coke was with many consumed power 50 ~ 60KWh equally.In addition, part material or composition in the ash content can bring harm to production, for example: the staple SiO in the ash content
2In furnace of calcium carbide, be reduced into silicon, a part generates silit and is deposited on furnace bottom, makes furnace bottom rising; A part and iron effect generate ferrosilicon, the corrosion furnace wall; , equipment such as material flowing nozzle and calcium carbide basin.SiO
2Content also influential to the calcium carbide gas forming amount, SiO
2Content is high more, and the calcium carbide gas forming amount is low more.
The ash content of coke is mainly derived from coking coal, and the coking coal ash content of China is higher, causes the ash content of coke of China also higher.The method of coke deliming concentrates on the preceding coal washing of coking at present, and the deliming of finished product coke is never had good method.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, invent a kind of method that can carry out degree of depth deliming to the finished product coke.Carbonaceous material delimings such as the coke powder that produces in this method STRENGTH ON COKE production and the shattering process, hard coal, bituminous coal are effective equally.
The method of deeply deashing cock of the present invention contains following steps:
A. making the raw coke pulverizing wherein, ash impurities fully exposes;
B. the coke powder of handling through step a is carried out high pressure alkali lye and leach, carry out liquid-solid separation after the leaching, intermediates coke powder that is once leached and alkali immersion liquid, intermediates coke powder water washs, and dries naturally to make its moisture content be lower than 15%;
C. the coke powder that alkali is soaked after the processing mixes with aqueous sulfuric acid; Under condition of normal pressure, carry out secondary pickling and handle, further remove ash content, carry out liquid-solid separation after the acidleach; Obtain product coke powder and acidleach liquid; Specification product coke powder water washs, and dries after drying naturally to moisture content to be lower than 5% again, obtains the low-ash coke powder of the finished product.The low ash coke powder that obtains can be directly as product, also can be according to the production requirement agglomeration.
Mean particle size range after described raw coke or coal dust are broken is 2 ~ 0.01mm.
Pressure range was 0.5 ~ 10MPa. when described high pressure alkali lye leached.
Described high pressure alkali lye leaches and uses sodium hydroxide solution, and sodium hydroxide solution mass concentration scope is 5 ~ 30%.
TR was 80 ~ 300 ℃ when described high pressure alkali lye leached, and liquid-solid ratio was 2: 1 ~ 10: 1 when high pressure alkali lye leached.
When described normal pressure acid solution leaches, adopt aqueous sulfuric acid, the aqueous sulfuric acid mass concentration is 3 ~ 30%.
TR was 20 ~ 100 ℃ when described normal pressure acid solution leached.
Liquid-solid ratio was 2: 1 ~ 10: 1 when described normal pressure acid solution leached.
Described high pressure base is soaked the immersion liquid of process output alkali and can repeatedly be recycled, and can reach 3 ~ 5 times according to the different material cycle index.
The pickling liquor of described normal pressure acidleach process output can repeatedly recycle, and can reach 4 ~ 6 times according to the different material cycle index.
But described high pressure base is soaked the immersion liquid of process output alkali, the pickling liquor of normal pressure acidleach process output output salkali waste, spent acid neutralizing treatment after repeatedly recycling.
The present invention mainly has following characteristics:
1. deliming is effective.The control felicity condition can be reduced to the raw material ash content below 10%.
2. product recovery rate is high.Except that mechanical loss, the fixed carbon in the raw material almost can all reclaim.
3. wide accommodation.Present method is applicable to most of coke (containing burnt grain), part coal and some other carbonaceous materials.
4. carrying capacity of environment is little, and energy consumption is low.This process using wet processing flow process, temperature of reaction is relatively low, and the acid of generation, alkali wasteliquid can neutralize each other, are easy to handle.
5. flow process is simple, and easy handling, raw material are easy to buying.
6. added value of product is high, and production cost is lower.
7. do not produce secondary pollution.Present method does not have solid waste discharge, does not have exhaust gas emission yet, and the waste water after the neutralizing treatment can return after simple process and recycle.
Description of drawings
Further specify flesh and blood of the present invention below in conjunction with accompanying drawing with instance, but content of the present invention is not limited to this.
Fig. 1 is a process flow sheet of the present invention.
Embodiment
The present invention follows these steps to carry out:
1. broken
According to the raw material own characteristic it is crushed to 2～0.01mm.
2. high pressure base is soaked
React heating in coke powder after the fragmentation and the aqueous sodium hydroxide solution adding autoclave, remove a part of ash content.Sodium hydroxide concentration is 5～0%, liquid-solid ratio can be 2: 1～and 10: 1, temperature of reaction is 80～300 ℃, reaction pressure is 0.5～10MPa, extraction time 10～90min.Leaching slurry is carried out liquid-solid separation, intermediates coke powder that is once leached and alkali immersion liquid.The alkali immersion liquid can repeatedly recycle until the alkali concn value of reaching capacity.Intermediates coke powder water washs, and dries naturally to make its moisture content be lower than 15%, carries out next step normal pressure acidleach and handles.
3. normal pressure acidleach
The coke powder that alkali is soaked after the processing mixes with aqueous sulfuric acid, under condition of normal pressure, carries out secondary pickling and handles, and further removes ash content.Acidleach can be carried out under condition of normal pressure, and the aqueous sulfuric acid mass concentration is 3～30%, and liquid-solid ratio is 2: 1～10: 1, and temperature of reaction is 20～100 ℃, and the reaction times is 5～60min.The acidleach slurries are carried out liquid-solid separation, obtain product coke powder and acidleach liquid.Pickling liquor can repeatedly recycle to the acid concentration value of reaching capacity.Specification product coke powder water washs, and dries after drying naturally to moisture content to be lower than 5% again, obtains the low-ash coke powder of the finished product.Low ash coke powder can be directly as product, also can be according to the production requirement agglomeration.
4. liquid waste disposal
After alkali immersion liquid and pickling liquor recycled repeatedly, strength of solution descended, and impurity concentration raises, and the leaching effect variation can be used as and leaches the waste liquid storage.Acid, alkali wasteliquid can neutralize each other, reduce treatment cost of waste liquor.
Technical process of the present invention such as Fig. 1.
Step is following:
(1) fragmentation is crushed to 2～0.01mm according to the raw material own characteristic with it.
(2) high pressure base is soaked: react heating in coke powder after the fragmentation and the aqueous sodium hydroxide solution adding autoclave, remove a part of ash content.The aqueous sodium hydroxide solution mass concentration is 5～30%, liquid-solid ratio can be 2: 1～and 10: 1, temperature of reaction is 80～300 ℃, reaction pressure is 0.5～10MPa, extraction time 10～90min.Leaching slurry is carried out liquid-solid separation, intermediates coke powder that is once leached and alkali immersion liquid.The alkali immersion liquid can repeatedly recycle until the alkali concn value of reaching capacity.Intermediates coke powder water washs, and dries naturally to make its moisture content be lower than 15%, carries out next step normal pressure acidleach and handles.
(3) normal pressure acidleach: the coke powder that alkali is soaked after the processing mixes with aqueous sulfuric acid, under condition of normal pressure, carries out secondary pickling and handles, and further removes ash content.Acidleach can be carried out under condition of normal pressure, and the aqueous sulfuric acid mass concentration is 3 ~ 30%, and liquid-solid ratio is 2: 1 ~ 10: 1, and temperature of reaction is 20 ~ 100 ℃, and the reaction times is 5 ~ 60min.The acidleach slurries are carried out liquid-solid separation, obtain product coke powder and acidleach liquid.Pickling liquor can repeatedly recycle to the acid concentration value of reaching capacity.Specification product coke powder water washs, and dries after drying naturally to moisture content to be lower than 5% again, obtains the low-ash coke powder of the finished product.Low ash coke powder can be directly as product, also can be according to the production requirement agglomeration.
(4) liquid waste disposal: after alkali immersion liquid and pickling liquor recycled repeatedly, strength of solution descended, and impurity concentration raises, and the leaching effect variation can be used as and leaches the waste liquid storage.Acid, alkali wasteliquid can neutralize each other, reduce treatment cost of waste liquor.
Embodiment 1
(1) raw material:
The high-ash coke powder that raw material produces when sieving for certain coke-oven plant is crushed to particle diameter less than 2mm.Its composition is as shown in table 1
Table 1 material composition table
(2) experiment condition
1. alkali soaks condition: the aqueous sodium hydroxide solution mass concentration is 15%, liquid-solid ratio 6: 1,110 ℃ of temperature, pressure 0.8MPa, extraction time 40min.
2. acidleach condition: the aqueous sulfuric acid mass concentration is 12%, and liquid-solid ratio is 6: 1,80 ℃ of temperature, extraction time 30min.
(3) experimental result:
Confirming under the condition that experimentizing obtains alkali and soak slip, slip once leaches intermediates coke powder and alkali immersion liquid through filtering.Coke powder carries out the normal pressure acidleach and handles after washing, oven dry processing moisture content are lower than 10%.Acidleach is filtered after finishing once more, obtains secondary and leaches the product coke powder, and this coke powder is handled through washing, oven dry and obtained the finished product.Product composition is as shown in table 2.
Table 2 product composition table
Embodiment 2
(1) raw material:
The particle diameter that raw material produces when broken for certain coke-oven plant is about the nut coke of 5cm, and it is crushed to particle diameter less than 2mm.Its composition is as shown in table 3.
Table 3 material composition table
(2) experiment condition
1. alkali soaks condition: the aqueous sodium hydroxide solution mass concentration is 10%, liquid-solid ratio 3: 1,150 ℃ of temperature, pressure 1.0MPa, extraction time 30min.
2. acidleach condition: the aqueous sulfuric acid mass concentration is 8%, and liquid-solid ratio is 3: 1,70 ℃ of temperature, extraction time 20min.
(3) experimental result:
Confirming under the condition that experimentizing obtains alkali and soak slip, slip once leaches intermediates coke powder and alkali immersion liquid through filtering.Coke powder carries out the normal pressure acidleach and handles after washing, oven dry processing moisture content are lower than 10%.Acidleach is filtered after finishing once more, obtains secondary and leaches the product coke powder, and this coke powder is handled through washing, oven dry and obtained the finished product.Product composition is as shown in table 4.
Table 4 product composition table
Embodiment 3
(1) raw material:
Raw material produces high-ash bituminous coal for the colliery, somewhere, is crushed to particle diameter less than 2mm.Its composition is as shown in table 5.
Table 5 material composition table
(2) experiment condition
1. alkali soaks condition: the aqueous sodium hydroxide solution mass concentration is 10%, liquid-solid ratio 6: 1,180 ℃ of temperature, pressure 1.4MPa, extraction time 1h.
2. acidleach condition: the aqueous sulfuric acid mass concentration is 10%, and liquid-solid ratio is 2: 1,80 ℃ of temperature, extraction time 30min.
(3) experimental result:
Confirming under the condition that experimentizing obtains alkali and soak slip, slip once leaches intermediates coal dust and alkali immersion liquid through filtering.Coal dust carries out the normal pressure acidleach and handles after washing, oven dry processing moisture content are lower than 10%.Acidleach is filtered after finishing once more, obtains secondary and leaches the product coal dust, and this coal dust is handled through washing, oven dry and obtained the finished product.Product composition is as shown in table 6.
Table 6 product composition table
Claims (7)
1. the method for a deeply deashing cock is characterized in that containing following steps:
A. making the raw coke pulverizing wherein, ash impurities fully exposes;
B. the coke powder of handling through step a is carried out high pressure alkali lye and leach, carry out liquid-solid separation after the leaching, intermediates coke powder that is once leached and alkali immersion liquid, intermediates coke powder water washs, and dries naturally to make its moisture content be lower than 15%;
C. the coke powder that alkali is soaked after the processing mixes with aqueous sulfuric acid, under condition of normal pressure, carries out secondary pickling and handles, and further removes ash content; Carry out liquid-solid separation after the acidleach, obtain product coke powder and acidleach liquid, specification product coke powder water washs; Naturally dry again after drying to moisture content and be lower than 5%; Obtain the low-ash coke powder of the finished product, the low ash coke powder that obtains is directly as product, or according to the production requirement agglomeration;
Mean particle size range after described raw coke or coal dust are broken is 2～0.01mm;
TR was 80～300 ℃ when described high pressure alkali lye leached, and liquid-solid ratio was 2: 1～10: 1 when high pressure alkali lye leached;
Pressure range was 0.5～10MPa when described high pressure alkali lye leached.
2. according to the method for the described deeply deashing cock of claim 1, it is characterized in that: described high pressure alkali lye leaches and uses sodium hydroxide solution, and sodium hydroxide solution mass concentration scope is 5～30%.
3. according to the method for the described deeply deashing cock of claim 1, it is characterized in that: when described normal pressure acid solution leaches, adopt aqueous sulfuric acid, the aqueous sulfuric acid mass concentration is 3～30%.
4. according to the method for the described a kind of deeply deashing cock of claim 1, it is characterized in that: TR was 20～100 ℃ when described normal pressure acid solution leached.
5. according to the method for the described deeply deashing cock of claim 1, it is characterized in that: liquid-solid ratio was 2: 1～10: 1 when described normal pressure acid solution leached.
6. according to the method for the described deeply deashing cock of claim 1, it is characterized in that: described high pressure base is soaked the immersion liquid of process output alkali and is repeatedly recycled, and reaches 3～5 times according to the different material cycle index.
7. according to the method for the described deeply deashing cock of claim 1, it is characterized in that: described normal pressure acid 7 process output pickling liquors repeatedly recycle, and reach 4～6 times according to the different material cycle index; Described high pressure base is soaked the immersion liquid of process output alkali, the pickling liquor of normal pressure acidleach process output output salkali waste, spent acid neutralizing treatment after repeatedly recycling.
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| CN2009101632328A CN101774565B (en) | 2009-12-25 | 2009-12-25 | Method for deeply deashing cock |
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| CN101774565B true CN101774565B (en) | 2012-01-11 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041128B (en) * | 2010-12-03 | 2013-04-24 | 宜宾天原集团股份有限公司 | Chemical deashing method for coal |
| CN104774670B (en) * | 2015-03-24 | 2017-04-05 | 石家庄新华能源环保科技股份有限公司 | A kind of production method and device of ashless coal |
| CN104891470B (en) * | 2015-04-17 | 2019-04-30 | 石家庄新华能源环保科技股份有限公司 | A kind of method of high temperature removal coal powder fraction |
| CN104962337A (en) * | 2015-06-05 | 2015-10-07 | 西安科技大学 | Chemical de-ashing method for fine blue-coke |
| CN106190420A (en) * | 2016-07-08 | 2016-12-07 | 江苏省冶金设计院有限公司 | A kind of method of low-order coal fixed carbon content in raising |
| CN107699263A (en) * | 2017-10-19 | 2018-02-16 | 曲靖市盛凯焦化有限责任公司 | A kind of coking process with addition of lignite |
| CN108675911B (en) * | 2018-08-21 | 2021-06-25 | 中国科学院上海高等研究院 | Calcium carbide acetylene production process capable of reducing generation of calcium carbide slag |
| CN111040819B (en) * | 2018-10-12 | 2021-08-20 | 国家能源投资集团有限责任公司 | Ash removal method for solid carbonaceous material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559402A (en) * | 2009-05-19 | 2009-10-21 | 昆明理工大学 | Method for purifying high-ash coke powder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559402A (en) * | 2009-05-19 | 2009-10-21 | 昆明理工大学 | Method for purifying high-ash coke powder |
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